Common compression zone access ports for positive displacement compressor.

摘要

In a compressor of the type in which there is a movable trapped volume such as a screw or scroll type of compressor the trapped volume moves into and out of fluid contact with one or more valves (40,50,60). The valve(s) (40,50,60) can provide fluid communication between the trapped volume and either suction for unloading or discharge for Vi control.